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Blockchain & Web3

dApp Development Services

Decentralised applications built by engineers who will first check (and usually tell you), that what you actually want is an ordinary web app that costs a fraction as much.

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What dApp Development means in practice

Who it’s for: Teams building a product whose value genuinely depends on trustlessness. A DeFi front end, an NFT platform, on-chain governance, or multi-party coordination with no acceptable central operator, plus teams already committed to a public chain who need the whole application built and secured by people who will be honest about the UX cost and the trade-offs rather than sell them the hype.

A decentralised application, or dApp, is an application whose backend logic runs on a blockchain through smart contracts rather than on a server you control, fronted by a Web3 interface that connects directly to a user’s own wallet (MetaMask and its kin), so the user signs and pays for their own transactions and no central party holds their account. The stack in practice is a set of smart contracts on an EVM chain written in Solidity, a front end usually built in React talking to the chain through libraries such as ethers.js, wagmi and viem, a wallet connection for signing, and (always), a body of off-chain components: an indexer such as The Graph to make on-chain data queryable, IPFS or Arweave for content that has no business sitting on a chain, and oracles where the contracts need to know anything about the outside world.

We take the same deliberately sceptical stance here that we take across all our blockchain work, and it is the most valuable thing we bring to the conversation. The overwhelming majority of ideas pitched to us as dApps do not need decentralisation at all. On inspection they are ordinary products (a marketplace, a loyalty scheme, a records system, a community app), that would be better, cheaper, faster and far more pleasant to use as a conventional web application with a normal login and a database behind it. Decentralisation is not a feature that makes a product better by default; it is a specific, expensive trade you make to buy trustlessness, and you should only pay for it when trustlessness is the actual requirement. We will say so out loud, before you commit a build budget, rather than quietly billing you to build the harder thing you assumed you wanted.

When decentralisation genuinely is warranted: when the point of the product is that no single operator, us included, can be trusted to hold the state, censor a transaction or rewrite the record. We build the dApp properly and treat the on-chain part as the unforgiving software it is. Smart contracts are immutable once deployed and frequently sit directly on top of value, so the engineering discipline is closer to safety-critical systems than to a typical web build. This service covers the whole of that: the feasibility call, the contract engineering, the Web3 front end and wallet integration, the off-chain indexing and storage, and the security review without which none of it should ship. It sits alongside our blockchain-development and smart-contract-development services, which go deeper on the ledger and the contract layer respectively.

What you get

  • A feasibility assessment first, which delivers a plain verdict on whether your product actually needs to be a dApp at all, and a concrete conventional-web-app alternative when it does not, which is the more common outcome by a wide margin
  • Smart-contract engineering on EVM chains in Solidity, written small, composable and audited, forming the trustless core that the rest of the application wraps
  • A Web3 front end (typically React with ethers.js, wagmi or viem), that connects to users’ wallets, builds and submits transactions, and shows honest state through the confirmation delays rather than pretending the chain is instant
  • Wallet integration and signing flows (MetaMask, WalletConnect and the common providers) with the irreversibility and gas cost of every action made plain to the user before they sign it
  • The off-chain surround any real dApp is mostly made of: an indexer such as The Graph so on-chain data is actually queryable, IPFS or Arweave for content, and oracles where contracts need outside data, with only what must be trustless kept on-chain
  • An adversarial smart-contract security review of every deployed contract, plus a key-custody and error-handling design, because in this domain an unreviewed contract is an unbounded, irreversible liability
  • Documentation and handover thorough enough that your own team can operate, extend and reason about both the on-chain and off-chain halves without depending on us

What dApp Development does for you

  • You find out a normal web app is the answer before you pay to build a dApp

    The single most valuable thing this service often delivers is the word "don’t". A feasibility assessment that concludes your product should be an ordinary web application with a login and a database saves you the entire premium of the decentralised build, the ongoing burden of operating contracts and off-chain infrastructure, and (just as importantly), it saves your users from the real friction of wallets, gas fees and unforgiving key management. Most firms in this space are structurally unable to give you that answer because it costs them the project. We give it because our reputation depends on it.

  • A genuinely trustless product where trustlessness is the point

    When the requirement is real. A DeFi front end where users must be able to interact with a protocol without trusting an intermediary, a governance system where the vote must be verifiable and uncensorable, coordination between parties who will not accept a central operator: a properly built dApp gives you exactly that and nothing a conventional app can replicate. The state lives on a public ledger, the logic executes the same for everyone, and no operator sits in the middle who could rewrite it. We build for precisely that case and no other.

  • An on-chain core engineered to survive its own permanence

    Because deployed contract code is immutable and executed faithfully by every node, a bug in it is not a defect you patch. It is potentially irreversible loss. The benefit of senior, security-first engineering here is not speed; it is that what we ship does not become a catastrophe. Small audited contracts, standard implementations preferred over bespoke cleverness, honest handling of failed and reverted transactions in the front end, and correctable data kept off-chain add up to a system you can run for years rather than a demo that impresses once and then becomes a liability nobody wants to own.

Why teams choose us for dApp Development

  • You want engineers who will confirm honestly whether your product needs to be decentralised at all, and tell you plainly when a conventional web app is the better, cheaper answer, rather than a firm with every incentive to say yes.
  • You have a genuine trustlessness requirement (DeFi, an NFT platform, on-chain governance, multi-party coordination), and want the whole application built by people who treat the on-chain part as unforgiving software rather than a fast web feature.
  • You understand that a dApp is mostly ordinary, well-built software wrapping a small trusted on-chain core, and you want a partner who architects it that way instead of trying to force everything onto the chain.
  • You want the real UX friction of Web3 (wallets, gas, confirmation delays, unforgiving keys), designed for honestly and mitigated where possible, not hidden until your users hit it in production.

What dApp Development includes

The concrete pieces of work this covers, scoped to what your problem actually needs.

  • Feasibility and "does this need to be a dApp" assessment

    The first and most important capability is deciding whether decentralisation belongs in your product at all. We interrogate the actual requirement: does the value genuinely depend on no single party being trusted to hold state or censor transactions, or is that just the framing the idea arrived in?, and deliver a clear verdict, most often with a conventional-web-app alternative attached. We treat this as real engineering work, not a sales preamble, because getting it wrong is the single most expensive mistake in the whole field.

  • Smart-contract engineering for the on-chain core

    Where a dApp is warranted, the trustless core is a set of Solidity contracts on an EVM chain. We keep them small, composable and explicitly bounded, favour well-reviewed standard implementations over novelty, and test adversarially rather than optimistically: assuming the contract will be attacked, because if it holds value it will be. This is the layer our smart-contract-development service goes deepest on, and it is where the discipline of the whole build is decided.

  • Web3 front-end development

    We build the interface users actually touch (typically React with ethers.js, wagmi or viem), that reads on-chain state, constructs transactions, and reflects the true state of the chain through pending, confirmed, reverted and dropped transactions rather than pretending everything is instant. Most of a good dApp is this: ordinary, well-built front-end software. We treat it as such, and we do not let the on-chain novelty become an excuse for a poor product.

  • Wallet connection and signing flows

    The wallet is the account, the identity and the signature all at once, and its behaviour is where most dApp UX succeeds or fails. We integrate MetaMask, WalletConnect and the common providers, handle network switching and account changes cleanly, and (crucially), make the cost and the irreversibility of every action plain before the user signs it. We do not obscure gas or finality to make the flow feel smoother; a user who does not understand what they are committing to is a support incident waiting to happen.

  • Off-chain infrastructure: indexing, storage and oracles

    A dApp that reads only from the chain directly is slow and painful, so we build the off-chain surround that makes it usable: an indexer such as The Graph to turn raw on-chain events into queryable data, IPFS or Arweave for content and media that must not live on a chain, and oracle integrations where contracts need reliable outside data. The judgement here is what belongs off-chain (which is most things), and we make it deliberately rather than defaulting everything onto the ledger.

  • Smart-contract security review and audit

    We review contract code adversarially, for reentrancy, arithmetic errors, access-control flaws, front-running exposure and the economic-logic mistakes that have drained real systems, whether the code is ours or an existing deployment behind a front end you have inherited. Because a deployed contract cannot simply be patched, this review is not an optional extra at the end; it is a first-class deliverable, and in this domain an unaudited contract sitting under a live dApp is an open-ended liability.

Where it fits

  • A front end for a DeFi protocol

    A team that needs a usable, trustworthy interface onto a decentralised finance protocol. The on-chain contracts already define the rules, and the requirement is that users can interact with them directly from their own wallets without trusting an intermediary to custody funds or route transactions. We build the Web3 front end, the wallet and signing flows, and the indexing that makes positions and history queryable, while being explicit throughout that we are building the interface and the engineering, not advising anyone on what to do with their money.

  • An NFT platform where ownership must be genuinely on-chain

    A platform for minting, holding and transferring tokens where the point is that ownership lives on a public ledger no operator can rewrite, and the media is addressed immutably. We implement the token standards correctly, build the minting and transfer flows and the wallet integration, and store the assets on IPFS or Arweave rather than pretending a URL on our server is decentralised. We are clear about the boundary: this is a technical mechanism for representing ownership on-chain, not an endorsement of anything as an investment.

  • On-chain governance and voting

    A community or consortium that needs decisions made through verifiable, censorship-resistant voting, proposals, votes and outcomes recorded on-chain so no administrator can quietly alter the count or exclude a participant. We build the governance contracts, the front end members use to propose and vote from their own wallets, and the indexing that makes the history transparent. This is a case where trustlessness is genuinely load-bearing: the whole value is that no one can be trusted to run the ballot centrally.

  • Multi-party trustless coordination

    Independent parties who must coordinate (escrow, conditional settlement, shared state that releases value on agreed conditions), with no neutral operator all of them accept between them. We build the contracts that encode the rules and enforce them impartially, and the application each party uses to interact. This is the honest heart of the dApp case, and also the one where we most often find, on inspection, that the parties would in fact accept a trusted operator, in which case we say so and the product becomes a much simpler web application.

How we approach dApp Development

We begin every dApp engagement by pressure-testing whether it should be one at all, and we mean that as a service rather than a pose. The first piece of work is an honest feasibility assessment: does your product’s value genuinely depend on decentralisation, on the fact that no single party, us included, can be trusted to hold the state or censor a transaction, or would a conventional web application with a login and a database serve your users better, faster and far more cheaply? When it is the latter, and it usually is, we say so plainly, show you the simpler design, and consider that a successful engagement even though it ends the dApp conversation. Chief among the reasons is your users: wallets, gas fees, confirmation delays and unforgiving key management are real friction, and imposing them on people who gain nothing from decentralisation is a product mistake, not a bold one.

When a dApp is genuinely warranted, we settle the load-bearing decisions before writing code: which chain, what belongs in the small on-chain core versus the large off-chain remainder, and how the wallet and transaction flows will handle the irreversibility the user is committing to. Then we build in short cycles against a test network, keeping contracts small and testing them adversarially as we go, with the front end honestly reflecting real chain state rather than a hopeful approximation of it. Security and key handling are design concerns from the outset rather than bolted on before launch, and the engineers who design the system are the ones who review and operate it, so we optimise for something your own team can run and reason about long after we have gone.

How an engagement runs, feasibility to handover

Everything starts with feasibility, and this is the phase we most want you to take seriously, because it is where the money (and your users’ goodwill), is either saved or wasted. We examine your product against the one test that matters: does its value genuinely require that no single party be trusted to hold state or censor transactions? We deliver a written verdict. If a conventional web app is the right answer, you get the simpler architecture and, ideally, the whole decentralised-build premium back in your pocket, along with a product your users will not have to fight. If a dApp is warranted, you get the chain choice, the on-chain-versus-off-chain boundary and the wallet-flow design settled explicitly, because those are the choices that are ruinous to reverse later.

From there we build the smallest real slice first: one working contract with its front end, wallet connection and off-chain indexing, deployed to a test network, to prove the design against reality rather than a whiteboard. We then deliver feature by feature in short cycles, keeping the on-chain footprint minimal, handling transaction states and failures honestly in the UI, and building the indexing and storage as we go. Before any contract touches real value it is reviewed adversarially. Finally we hand over with an audit of every deployed contract, a key-custody and error-handling review, and documentation thorough enough that your team can operate and extend both halves of the application without depending on us, because we build systems to be owned, not to create dependence.

The on-chain / off-chain split, and why most of a dApp is off-chain

The defining architectural decision in any dApp (after the prior decision of whether to build one at all), is where the boundary between on-chain and off-chain falls, and the honest default is that most of the application lives off-chain. You cannot and should not put everything on the chain: on-chain storage is extraordinarily expensive in gas, on-chain data is permanent and public by design, and on-chain computation is slow and costly. So we keep on the ledger only what genuinely must be trustless: the authoritative state, the value, the rules that no operator may be trusted to enforce, and we keep everything else off it. Large data and media go to IPFS or Arweave; queryable data is served through an indexer such as The Graph rather than read painfully from the chain; anything private or correctable stays in conventional stores entirely.

The front end is an ordinary React application that happens to talk to a chain through ethers.js, wagmi or viem and to a wallet for signing. Reads mostly come from the indexer, not from the node directly, because reading raw contract state for anything non-trivial is slow. Writes are transactions the user signs and pays for in their own wallet, which means the interface has to handle a genuinely harder set of states than a normal web app (pending, confirmed, reverted, dropped, stuck behind a low gas price), and show them honestly. Where contracts need outside data, an oracle bridges it in, with the understanding that the oracle is a trust assumption you have to reason about explicitly. A well-judged dApp ends up looking like a mostly-ordinary web application with a small, deliberate on-chain core and a body of off-chain infrastructure around it, and that is exactly right.

Why security here is a discipline of its own

dApp security is not ordinary application security with a wallet attached; the on-chain half has failure modes that are unforgiving in a way most software is not. A smart-contract bug is executed faithfully by every node, usually cannot be patched once deployed, and frequently sits directly on top of value, so a reentrancy flaw, an arithmetic error or a weak access check can drain funds irreversibly, with no rollback and often no recourse. These are not hypothetical risks: mistakes of exactly this kind have caused enormous, permanent losses across the industry. We therefore treat every contract as permanent until proven otherwise: kept small, built from well-reviewed standard implementations wherever possible, and audited adversarially before it ever holds real value.

The front end and the wallet layer carry their own risks, and they are the ones users actually encounter. A malicious or careless signing flow can trick a user into approving a transaction that does something other than what they intended, so we make every signature request legible and honest about what it authorises, and we never ask for blanket approvals where scoped ones will do. Key management is the user’s burden in a dApp and it is unforgiving: lose the key and the assets are gone, leak it and someone else has control, with no administrator anywhere to reset anything. We design the flows to reduce foot-guns rather than assume the user will not make a mistake. And we are blunt about what a public, permanent ledger costs beyond bugs: it is in direct tension with privacy law and its right to erasure, and with the ordinary need to correct a mistake, which is precisely why we keep sensitive and correctable data off-chain by design.

Our stance: honesty first, then engineering

The methodology rests on one conviction that shapes everything else: a dApp is justified only when a product’s value genuinely depends on decentralisation (on no single party being trustable to hold state or censor transactions), and this is true far less often than the field pretends. Most ideas pitched as dApps are conventional products in Web3 clothing, and would be better, cheaper and much more usable as normal web apps. So we lead with the sceptical question rather than the build, and we treat "you do not need this" as a legitimate, valuable deliverable rather than a lost sale. We weigh your users heavily in that judgement: the friction of wallets, gas and irreversible keys is a real cost, and it is only worth imposing when decentralisation buys something those users genuinely need.

When a build is warranted, the second conviction takes over: the on-chain part is unforgiving software and must be engineered accordingly, while the rest is ordinary software that deserves to be built well rather than excused by novelty. Chain choice and the on-chain boundary are settled before code exists; the trustless core is kept small and everything correctable is kept off it; contracts are written small, tested adversarially and audited as though they will be attacked, because if they hold value they will be. The front end reflects real chain state honestly, delays and failures included. The engineers who design the system review and operate it, so we build for years of safe operation and a team that can maintain it. And we hold a firm line on remit: we build engineering, not speculation; regulatory caveats apply to on-chain assets and we make sure they are understood; and we give no financial or investment advice.

Technologies we build it with

Chosen per problem, not per fashion. This is the stack we most often reach for on this work.

How we deliver

  1. 01

    Discover

    We map the system, the constraints and the business it serves, including the parts nobody documented.

    Architecture brief

  2. 02

    Architect

    Decisions get made, written down and defended before a line of production code exists.

    Decision records

  3. 03

    Build

    Short cycles against working software. You see progress in the product, not in a status deck.

    Shipping increments

  4. 04

    Operate

    Monitoring, incident response and iteration. The system is alive, so the engagement is too.

    Runbooks & SLOs

Want a straight answer on dApp Development?

A short call with a senior engineer, before you write a brief. If dApp Development is the wrong answer for your situation, we will say so and tell you what we think is right.

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What changes

  • The right product shape, honestly chosen

    You leave the feasibility stage knowing whether your product genuinely needs to be a dApp, and, far more often than the field admits, with a simpler, cheaper conventional web app instead, the build premium still in your pocket and your users spared needless friction.

  • A genuinely trustless application, where that is the point

    Where the requirement is real, a dApp whose on-chain core no operator can rewrite or censor, with a Web3 front end and wallet flows that make the trustlessness usable. The one capability a conventional app cannot give you, built for exactly the problem that needs it.

  • On-chain code that will not sink you

    Small, adversarially-audited contracts with honest transaction handling in the front end and correctable data kept off-chain, so the permanence and irreversibility of the ledger are an engineered strength rather than a waiting catastrophe.

Industries we serve

Domain knowledge changes what gets built. A few of the sectors we know before the first meeting.

How pricing works

  • A paid discovery and feasibility assessment first (frequently the most valuable thing we do), which establishes whether your product needs to be a dApp at all and, if so, which shape, before any build is committed. When the answer is a conventional web app, this small fee is the whole cost you pay, and it will have saved you a great deal more.
  • Fixed-scope builds for well-defined dApps. A defined set of contracts with a Web3 front end, wallet integration and the off-chain indexing and storage around them, quoted once the chain and the on-chain boundary are settled, so the price reflects a design rather than a guess.
  • Focused smart-contract audits and security reviews for existing on-chain code sitting under a live or planned front end, priced by assessment, because an unreviewed contract behind a dApp is an open-ended liability and the review is worth doing on its own.
  • Monthly senior engagement for evolving dApps where scope shifts and you want continuity from the same people who designed the contracts, built the front end and understand how to operate the whole system safely.

Typical timeline

  1. 01

    Feasibility and product-shape decision

    Typically one to two weeks establishing whether your product needs to be a dApp at all (and delivering the conventional-web-app alternative when it does not), then, if it does, settling the chain, the on-chain-versus-off-chain boundary and the wallet-flow design. These are the decisions everything downstream depends on and the ones most expensive to reverse.

  2. 02

    First working slice

    Two to four weeks delivering one real capability end to end. A working contract with its front end, wallet connection and off-chain indexing, on a test network, to prove the design against reality rather than a whiteboard, and to surface the hard UX and integration problems while they are still cheap to fix.

  3. 03

    Iterative build

    Feature-by-feature delivery in short cycles, keeping the on-chain footprint minimal, handling transaction states and failures honestly in the interface, and building the indexing, storage and oracle integrations as the work proceeds rather than bolted on at the end.

  4. 04

    Audit and handover

    Adversarial review of every deployed contract, a key-custody and signing-flow review, and documentation thorough enough that your own team can operate, extend and reason about both the on-chain and off-chain halves long after the engagement ends, because the system is meant to be yours, not a dependency on us.

What working with us actually means

  • We will tell you to build a normal web app

    Most dApp briefs describe a product a conventional web application serves better, cheaper and far more usably, and we say so before you spend a build budget. That honesty is our differentiator, not a quota, if your product genuinely needs decentralisation we will build it properly, and if it does not, you will hear that first, clearly, with the simpler alternative already drawn and your users’ experience protected.

  • Senior engineers on unforgiving software

    A dApp punishes guesswork more than almost any product: a contract bug is executed faithfully and irreversibly, a mishandled signing flow can cost a user everything. The people writing your contracts, building your Web3 front end and reviewing your wallet flows are experienced engineers, not juniors learning the failure modes at your users’ expense.

  • We operate what we build

    We run the systems we ship, so we design for years of safe operation, small audited contracts, a minimal on-chain footprint, honest transaction handling, and correctable data kept off-chain. The result is a dApp your team can actually maintain, not an impressive demo that quietly becomes a liability nobody owns.

  • Engineering, not speculation

    We build dApps; we do not give financial or investment advice and we do not promote buying tokens or cryptocurrency. Where a product genuinely needs on-chain assets we implement the standards correctly, make sure the regulatory position is understood, and treat them as a technical mechanism for representing ownership, never as something to speculate on, which is outside both our remit and our interest.

How to engage us

Three ways to work with us on this, chosen to fit the problem, not our margin.

Related services

Part of Digital Transformation. Other work we do alongside this.

Common questions

Before anything else, does our product actually need to be a dApp, or would a normal web app do?

Almost certainly a normal web app, and we would rather establish that at the start than after you have paid to build a decentralised one. The honest test is whether your product’s value genuinely depends on no single party (us included), being trustable to hold the state or censor a transaction. If yes, a dApp may be warranted. If a trusted operator is acceptable, or a login and a database would serve your users just as well, then a conventional web application is simpler, faster, cheaper and far more pleasant to use, with none of the wallet, gas and key-management friction a dApp forces on people. That is the outcome of most feasibility assessments we run, and when it is yours, we will tell you plainly and hand you the simpler design instead.

What does a dApp actually consist of, what are you building?

Four layers, roughly. The trustless core is a set of smart contracts, usually Solidity on an EVM chain, holding the state and enforcing the rules no operator may be trusted with. The front end is typically a React application talking to the chain through ethers.js, wagmi or viem. Wallet integration (MetaMask, WalletConnect and the like), lets the user sign and pay for their own transactions. And there is always an off-chain surround: an indexer such as The Graph to make on-chain data queryable, IPFS or Arweave for content, and oracles where the contracts need outside data. Most of a good dApp is that ordinary, well-built software around a small on-chain core, not the core itself.

Aren’t dApps just harder to use? What about wallets, gas fees and confirmation delays?

Yes, and we will not pretend otherwise: the UX friction is real and it is the main reason most ideas should not be dApps. Users need a wallet, they pay gas for every action, transactions are not instant and can fail or get stuck, and key management is unforgiving: lose the key and the assets are gone, with no one to reset anything. We design for that honestly: legible signing requests, clear costs and states, off-chain infrastructure to make reads fast, but we cannot make decentralisation frictionless, because the friction is partly inherent to it. That is exactly why we only build a dApp when the trustlessness is worth the cost to your users, and say so when it is not.

Why do you insist most of the application should be off-chain?

Because you cannot and should not put everything on a chain. On-chain storage is extraordinarily expensive in gas, on-chain data is permanent and public by design, and on-chain computation is slow and costly. So we keep on the ledger only what genuinely must be trustless. The authoritative state, the value, the rules no operator may be trusted to enforce, and keep everything else off it: media on IPFS or Arweave, queryable data served through an indexer, anything private or correctable in conventional stores. A well-built dApp is mostly ordinary software with a small, deliberate on-chain core. If a design pushes most of the application onto the chain, that is usually a sign the chain was the wrong tool for that part in the first place.

How do you handle the risk that a smart-contract bug is irreversible?

By treating the contracts under your dApp as unforgiving, safety-critical software rather than a fast web feature, because the risk is real and the losses in this space have been enormous. A deployed contract is executed faithfully by every node, usually cannot be patched, and often sits directly on top of value, so a reentrancy flaw, an arithmetic error or a weak access check can drain funds with no rollback. We keep contracts small, prefer well-reviewed standard implementations to bespoke cleverness, and audit every contract adversarially before it holds real value: the same discipline our smart-contract-development service centres on. On the front end we make every signing request legible, so users understand what they are authorising rather than approving something they did not intend.

Thinking about dApp Development?

Tell us the problem in your own words, not in requirements. A senior engineer reads it and comes back with a straight view on whether dApp Development is the right answer here, or what would be.

  1. 01A senior engineer reads it. Not a form queue, and not an account manager.
  2. 02We reply either with questions or with a straight answer that we are not the right fit.
  3. 03If it looks like a fit, a technical call with the person who would actually run the delivery.
  4. 04Then scope, effort and risk in writing, before anyone signs anything.
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